Summer School "Ecology and Society: Frontiers and Boundaries" / 3 - 7 June 2019

Ecosystems societies Climate change Forests Hydrosystems Atmosphere Biodiversity Agrosystems Pressures Impacts Modelling Pollution Ecotoxicology Biogeochimical cycles Ecology Adaptability

Forest trip

Boat trip

Dune du Pyla

Group Picture - Crédits photo LabEx COTE

Field trip - Salles

Conference room

Hôtel Chateau Latour - Crédits photo LabEx COTE

Crédit, G.Loubota

Visiting Bordeaux

Vineyards

Vineyards

Fieldtrip Ciron - Crédits photo LabEx COTE

Forest Trip - Crédits photo LabEx COTE

Vineyards

Forest trip

Welcome !

Evening

Boat trip

Visiting Bordeaux

Vineyard - Crédits photo LabEx COTE

Weak signals from an ecological and statistical perspective

by Frédéric Barraquand

In this talk, I will try to delineate how our ability to detect a difference of ecological relevance depends not only on a signal nature and strength, but also on ecological and observational noise as well as study design. Then I will explore several ways to obtain weak ecological signals despite reasonably large sample sizes: coarse measurement tools and multiple confounding factors. These notions will be illustrated with varied ecological case studies, from bird monitoring to threats to pollinators. I will then discuss recent attempts to infer signs of imminent ecological collapse from so-called early warning signals, that are often a rather weak manifestation of impending large-scale ecological changes.



TOP